Phusion Passenger is a fast and robust web server and application server for Ruby, Python, Node.js and Meteor. Passenger takes a lot of complexity out of deploying web apps, and adds powerful enterprise-grade features that are useful in production. High-profile companies such as Apple, New York Times, AirBnB, Juniper, American Express, etc are already using it, as well as over 350.000 websites.

Phusion Passenger is under constant maintenance and development. Version 4.0.42 is a bugfix release.

Recent changes

[Standalone] The MIME type for .woff files has been changed to application/font-woff. Fixes issue #1071.

There are now APT packages for Ubuntu 14.04. At the same time, packages for Ubuntu 13.10 have been abandoned.

Introduced a new command, `passenger-config build-native-support`, for ensuring that the native_support library for the current Ruby interpreter is built. This is useful in system provisioning scripts.

For security reasons, friendly error pages (those black/purple pages that shows the error message, backtrace and environment variable dump when an application fails to start) are now disabled by default when the application environment is set to ‘staging’ or ‘production’. Fixes issue #1063.

Fixed some compilation warnings on Ubuntu 14.04.

Fixed some compatibility problems with Rake 10.2.0 and later. See Rake issue 274.

“Phusion” and “Phusion Passenger” are registered trademarks of Phusion. “Rails”, “Ruby on Rails” and the Rails logo are registered trademarks of David Heinemeier Hansson. All other trademarks are property of their respective owners.